25 11 0434219 is the part number for the lever. I recommend buying an extra circlip or two because I lost the factory one the first time I did this. The part number for the circlip is 25 11 1220379.
I got a new 335i and I'm trying to do this mod for the second time but I'm stuck on getting the rubber boot out. I don't remember having so much trouble with that damn rubber boot. It looks like the outside lip of the boot was tucked under the metal from the factory on the left edge. I don't know if that's why it's so hard to take off this time around but it's a real PITA and my fingers are raw from pulling on it.